Sunday Chess Puzzle, November 14

Today's chess puzzle is below.

I played black, and I was not in a very favorable position. However, black can try to bait white into simplifying the position in black's favor. Black plays Rxg2. At this point, white has two legal moves: take the rook back, or move the king. If white takes the rook, what is black's response? If white moves the king, can continue his attack?